Patent DE-102006061140-A1 (DE)
Title: Device for thermally cutting a textile web consisting of meltable thread material into tapes, comprises a flexible knife between two stationary fixing points, a housing arranged on one side of the textile web, and two arms at the housing
Inventor: VAUPEL MARC
IPC: B26F3/12
Filed: 2006-12-22
Abstract: The device (30.1) for thermally cutting a textile web (10) consisting of meltable thread material into tapes (10'), comprises a flexible knife between two stationary fixing points, a housing (31) arranged on one side of the textile web, and two arms (37, 38) at the housing, at which one of the fixing points presents itself for the knife. An electrical power is guided through the knife over the fixing points and is heated. The housing bears both the fixing points still one of the fixing points is arranged over the arm on the opposite-lying side of the textile web. The device (30.1) for thermally cutting a textile web (10) consisting of meltable thread material into tapes (10'), comprises a flexible knife between two stationary fixing points, a housing (31) arranged on one side of the textile web, and two arms (37, 38) at the housing, at which one of the fixing points presents itself for the knife. An electrical power is guided through the knife over the fixing points and is heated. The housing bears both the fixing points still one of the fixing points is arranged over the arm on the opposite-lying side of the textile web. The arm clamps down the separated sections introduced in the textile web between the adjacent tapes. A section of a clamping section of the knife, which lies outside of a working section producing the separated section, is guided over a deflection member (50). The deflection member is spring-loaded, and a force bears on the clamping section and produces a defined clamping force in the knife, which is effective in the working section of the knife. The knife is pushed away from the arm by the elastic force of the deflection member. The deflection member remains at one of the arms and has a base part for its fastening. The base part is recessedly arranged in the arm in partial manner. The spring-load producing spring element is arranged in the interior of the base part from the deflection member. The deflection member consists of a force-loaded slider, which supports its free end at the knife. The slider is a plunger. A guide means for the knife presents itself at the free plunger end. The deflection member is a spring, which simultaneously produces the spring force from the deflection member and directly or indirectly supports itself at the knife. The spring is a curved leaf spring, which is fastened with its one end at the arm. The other spring end has the guide means. A curvature of the leaf spring supports itself at the knife and simultaneously serves for deflecting the knife. The deflection member is a force-loaded lever, which is pivotally mounted at the arm and supports its free lever arm at the knife. The guide means is arranged at the free end of the lever and is a groove, round profile piece and a rotatable roller. A guide lug for positioning the knife wires is arranged at one of the arm from the housing. The knife is a heatable wire, which has a circular cross-section. Pressure surfaces at the one side of the textile web and/or counter-pressure surfaces at the other side of the textile web are arranged at the housing and/or at the arm. The textile web views in a transport direction. The pressure surfaces and/or counter-pressure surfaces are arranged upstream and/or downstream to the knife wires. The pressure surfaces against the upper side and the counter-pressure surfaces against the lower side of the textile web push in the boundary region of the sectioned tapes.